Answer:
The Resultant Induced Emf in coil is 4∈.
Explanation:
Given that,
A coil of wire containing having N turns in an External magnetic Field that is perpendicular to the plane of the coil which is steadily changing. An Emf (∈) is induced in the coil.
To find :-
find the induced Emf if rate of change of the magnetic field and the number of turns in the coil are Doubled (but nothing else changes).
So,
Emf induced in the coil represented by formula
∈ =
...................(1)
Where:
.
{ B is magnetic field }
{A is cross-sectional area}
.
No. of turns in coil.
.
Rate change of induced Emf.
Here,
Considering the case :-
&
Putting these value in the equation (1) and finding the new emf induced (∈1)
∈1 =
∈1 =
∈1 =![4 [-N\times\frac{d\phi}{dt}]](https://tex.z-dn.net/?f=4%20%5B-N%5Ctimes%5Cfrac%7Bd%5Cphi%7D%7Bdt%7D%5D)
∈1 = 4∈ ...............{from Equation (1)}
Hence,
The Resultant Induced Emf in coil is 4∈.
Answer:
The speed and direction of the apple is 1.448 m/s and 66.65°.
Explanation:
Given that,
Mass of apple = 0.110 kg
Speed = 1.13 m/s
Mass of orange = 0.150 kg
Speed = 1.25 m/s
Suppose we find the final speed and direction of the apple in this case
Using conservation of momentum:
Before:
In x direction,



In y direction = 0
After:
is velocity of the apple in the y direction
is the velocity of the apple in the x direction
Momentum again:
In x direction,



In y-direction,



We need to calculate the speed of apple

Put the value into the formula


We need to calculate the direction of the apple
Using formula of angle

Put the value into the formula


Hence, The speed and direction of the apple is 1.448 m/s and 66.65°.
Answer:
40m approximately
Explanation:
Given
Force =377N
Mass =86.5kg
Velocity =13.2m/s
Required
Radius of the track
The expression for the centripetal force acting on the cyclist is
F=mv²/r
Make r subject of the formula
r= mv²/F
Substitute
r=86.5*13.2²/377
r= 15,071.76/377
r=39.97
r=40m approximately
Answer:
Explanation:
Given







acceleration of object


(b)For maximum positive displacement velocity must be zero at that instant
i.e.


substitute the value of t


Answer: Hello your question is incomplete attached below is the complete question
Ra = 1132 N
Rb = 522.6 N
Pa = 679.7 N
Explanation:
To determine the scalar components Ra
therefore : Ra =
= 1132 N
To determine the scalar component Rb

therefore : Rb =
= 522.6 N
To determine the orthogonal projection Pa of R onto
Pa = 750 cos
= 679.7 N